Guard for power-presses



J. E. PHILLIPS.

GUARD FOR POWER PR'ESSES.

APPLICATION FILED MAR. 26, 1919.

1,329,01 1 Patented Jan. 27, 1920.

3 SHEETS-SHEET 1.

n W T E. PHILLiPS.

GUARD FOR POWER PRESSES.

APPLICATIO N FILED MAR.26, 1919- Patented J an 27, 1920.

3 SHEETSSHI -IET 2- f 8 1a 0 0-. 6 1 *1 I T I: y j 1 11 M9 18 f l 2 I I t: a v 5 i far 7,666 GAS I J. E. PHILLIPS.

GUARD FOR POWER PRESSES. APPLICATION FILED MAR.26, 1919.

Patented J an. 27, 1920.

3 SHEETSSHEET 3- JOHN EDWIN PHILLIPS, OF BIRMINGHAM, ENGLAND.

GUARD FOR row nn-rnnssns.

Specification of Letters Patent.

Patented Jan. 27, 1920.

Application filed March 26, 1919. Serial No. 285,320.

To all whom it may 60mm:

Be it known that 1, JOHN EDWIN PHILLIPs, subject of the King of Great Britain, residing at Birmingham, England, have invented. certain new and useful Improvements in Guards for Power Presses, of which the following is a specification.

This invention relates to guards or safety devices for power presses, but has more particular reference to collapsible or folding guards of the lazy-tongs or other type which are connected with the clutch lever or pedal of the press so as to be extended into their operative or safety position prior to the plunger of the press descending.

The principal object of the present invention is to provide an automatically operated folding or collapsible guard which is adapted to protect both the front and sides ofthe tool or working space, while admitting of their automatic folding or extending and collapsing action.

Further objects are to provide means for locking the guard inits extended position until the plunger of the press has completed its stroke; to admit of the adjustment leverconnecte'd to the saidsliding member of the form or size of the guard accordingto the nature of the tools being used; to provide simple means for the adjustment in height; to enable the throw of the guard to be altered as may be required; and to provide improved and simplified means for op erating the guard.

According to the present invention the guard comprises two collapsible and extensible frames inounted vertically at an angle to one another in order to cover the sides as well as the front of the tools, and connected to or engaged by a slidable actuating device for the purpose of extending and collapsing the said frames. The frames are adapted to be fixed at different angles relatively to one another to suit the particular nature of the tools, and the height of the guard is arranged to be altered by means of nuts on the vertical axis and by adjusting the height of the sliding actuating member.

The sliding actuating member is adapted to be operated from .the clutch lever or pedal by means of a substantially horizontal by a linlf'. The; distancebetween the and the fulcrum-of the-lever is 'inad e-ad-'- just aliie for as purpose of varying the throw of the collapsible guard frames.

A catch device is employed which, when the guard is extended, engages with said guard to lock it in such extended position, but is positively disengaged therefrom on the plunger completing its downward stroke so that the guard is free to be collapsed when the plunger rises.

Figure 1 of the accompanying drawings represents a side elevation of the improved guard, same being shown in its collapsed condition, with the plunger raised.

Fig. 2 is a side elevation showing the guard locked in its extended position.

Fig. 3 is a front view.

Fig. 4 represents a plan of the guard when extended.

Fig. 5 is a detail view of the means for locking the guard in extended position.

The guard comprises two collapsible lazytongs 1, set vertically at an angle to one another, and having their lower inner ends pivoted to lugs 2 of collars 3 fixed by nuts 18, 18, upon a screw-threaded vertical guide rod 4 carried by the bed of the press, while the upper inner ends of the frames 1 are respectively pivoted to lugs 5 of collars 6 slidably mounted upon the said guide rod 4. spring 7 I surrounds the latter and presses upwardly upon the collars 6 in order to tend to collapse the frames 1 into the posi tion shown in Fig. 1. Mounted upon the rod 4 above the collars 6 is a slide 8 through which passes the vertical actuating rod 9, said rod 9 carrying nuts 10 engaging with the upper face of slide 8. By altering the position of these nuts the height of the guard can be adjusted as required. The rod 9 is connected at its lower end to a substantially horizontal lever 19 fulcrumed at 20 to the bed of the press and having its free end engaged within a slotted bracket 21 attached to the clutch operating handlever 22.

When the hand-lever 22 is depressed to throw in the clutch, the lever 19 is also depressed, drawing down the rod 9, and cansing the slide 8 with collars 6, 6, to descend upon the rod 4, thereby extending the frames 1, 1, into the position shown in Figs. 2 and 3'. On releasing the lever 22 to throw out the clutch, the spring returns the parts to theirformer positions. as seen from Fig.4, the frames 1, 1, are set at an angle to one anetlier so as to pretect the sides as Well as the frent of the tools, and this angle can be adjusted to suit the size or form of the tool by slackening the nuts 18, 18, and

then moving the frames to the desired position when the collars 2, 2, can be again fixed in place by screwing up the nuts.

To vary the throw of the guard frames, the fulcrum pin of lever 19 can be engaged with one or other of a series of holes 23 in the bed, and the pivot-pin 2 1 at the lower end of the rod 9 can be engaged with one or other of a series of holes 25 in the lever 19.

Fixed to the lower portion of guide rod 4 is a vertical blade spring 11 terminating at its upper end in a catch head 12 which,

when the guard is collapsed, bears against the edge of the slide 8.

When the pedal or hand lever is operated the actuating rod 9 is drawn down, thus lowering the slide 8 and collar 6 upon the guide rod eland extending the guard 1. The catch 12 moves over the upper edge of slide 8 immediately above a locking recess 13 in said edge, so that on the pedal or hand lever being released the spring '7 slightly lifts the slide 8 until the catch 12 is fully engaged with the recess 13, as shown in Fig. 2, the guard thus being locked in its extended position.

The plunger 1% of the press has attached to it a lateral arm 15 carrying an adjustable and depending hollow shank 16 provided with a releasing head or rim 17 having a beveled or curved periphery adapted, on the plunger completing its downward stroke, to engage the beveled upper end of the catch 12 in order to disengage the latter from the recess 13 in the slide 8, said catch being forced laterally clear of the slide, leaving the guard free to be collapsed by the expansion of the spring 7.

By adjusting the position of the nuts 18 upon the rod 4 the height of the guard may be varied as required, the position of the nuts 10 on rod 9 being altered to correspond.

Having fully described my invention, what I desire to claim and secure by Letters Patent is l. A guard for a power press comprising two collapsible and extensible frames mounted and adjustable to different angular positions. upon a common vertical axis, and sliding actuating means for extending and collapsing the said frames.

2. A guard for a power press comprising a vertical axis, two lazy-tongs frames mounted on said axis at an angle to one another the lower inner end of each frame being fixed, sliding members on said axis to which the upper inner ends of the lazy-tongs frames are connected, and means for operating the said sliding members in order to extend and collapse the said frames.

' In a power press, the combination with a clutch operating member, of a guard comprising two collapsible and extensible frames mounted vertically atan angle to one another, sliding actuating means for extending and collapsin said frames, a substantially horizontal lever adapted to be actuated by the clutch operating member, and a member connected between said lever and the sliding frame-actuating means.

1. A guard for a power press comprising a vertical axis, two collapsible frames end members of which are connected to collars adjustably fixed upon said vertical axis by means of nuts, sliding actuating means upon said axis for extending and collapsing said frames, and means whereby the normal height of the actuating means is adjustable.

5. In a power press, the combination with a clutch operating member, of a guard comprising two collapsible and extensible frames mounted vertically at an angle to one another, sliding actuating means for extending and collapsing said frames, a substantially horizontal lever adapted to be actuated by the clutch operating member, a link member connected between said lever and the sliding frame-actuating means, and means whereby the distance between the fulcrum of the horizontal lever and the link member is adjustable.

6. A guard for a power press comprising a vertical axis, two lazy-tongs frames mounted on said axis at a relative angle to one another the lower inner end of each frame being fixed, sliding members on said axis to whichthe upper inner ends of the frames are connected, a spring tending to collapse the guard, and means for operating said sliding members in order to extend the guard.

7. A guard for a power press comprising two collapsible and extensible frames mounted. vertically at an angle to one another, actuating means for extending and collapsing the said frames, a catch device adapted to lock the guard in its extended position, and means associated with the plunger of the press for positively disengaging the catch on the plunger completing its downward stroke.

8. A guard for a power press comprising two collapsible and extensible frames mounted vertically at an angle to one another, a sliding member for actuating the frames, a spring catch adapted to engage said sliding member in order to lock the guard in its extended position, and means associated with the plunger of the press for positively disengaging the catch on the plunger completing its downward stroke.

9. A guard for a power press comprising a vertical axis, two lazy-tongs frames mounted on said axis at a relative angle to one another the lower inner end of each frame being fixed, sliding members on said axis to which the upper inner ends of the frames are connected, a spring catch adapted to engage and lock the guard in its extended position, a coiled spring on the vertical axis tending to collapse the guard end to mainmy hand in presence of two subscribing tam the letter 1n engagement wlth the catch, witnesses. and means associated with the plunger of the press for positively disengaging the JOHN EDWIN PHILLIPS 5 catch on the plunger completing its down- WVitne'sses:

Ward stroke. H. N. SKERRETT,

In testimony whereof I have hereunto set W. S. SKERRE'I'I. 

